mapM /= traverse?

[Herbert Valerio Riedel]

On 2015-05-12 at 18:10:31 +0200, Edward Kmett wrote:

[...]

> Consequently, we're looking at removing mapM entirely from the class and
> just making it a top level definition.
>
> To do that we'd need to deprecate redefinition of the method in instances
> for a version or two. This would need a new form of deprecation, where you
> deprecate redefinition but not use of a member of a class. (I think Herbert
> filed an issue to create it, but I can't find it off hand.)

https://ghc.haskell.org/trac/ghc/ticket/10071

[...]

Cheers,
  hvr